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All Journal Telematika International Journal of Computing Science and Applied Mathematics Jambura Journal of Mathematics Community Development Journal: Jurnal Pengabdian Masyarakat Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Postulat : Jurnal Inovasi Pendidikan Matematika Journal of Fundamental Mathematics and Applications (JFMA) Jurnal Pengabdian dan Pemberdayaan Masyarakat Indonesia
Mohammad Ghani
Universitas Airlangga
Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Health Professions Mathematics Public Health Social Sciences Other

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Journal : Telematika

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Study of The Effect Stuart and Prandtl Numbers on Diamond Nano Fluid Flowing Through Cylindrical Surface Yolanda Norasia; Mohamad Tafrikan; Mohammad Ghani; Asmianto Asmianto; Indira Anggriani
Telematika Vol 16, No 1: February (2023)
Publisher : Universitas Amikom Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35671/telematika.v16i1.2103

Abstract

Fluid flow problems can be constructed using applied mathematical modeling and solved numerically using computational fluid dynamics (CFD). Nondimensional variables, stream functions, and similarity variables are used to simplify the governing equations from Newton's law, and thermodynamics law. These equations consist of continuity equations, momentum equations, and energy. Backward Euler method numerically solves the equations. The results show that the smaller the influence of the given Stuart number and Prandtl number, the fluid velocity and temperature will increase. Diamond nano fluid with water base fluid moves faster and experiences an increase in temperature faster than engine oil base fluid. this is due to the thermo-physical heat capacity of the water base fluid being greater than that of the engine oil.
SEIHR Model on Spread of COVID-19 and Its Simulation Rois, Muhammad Abdurrahman; Tafrikan, Mohamad; Norasia, Yolanda; Anggriani, Indira; Ghani, Mohammad
Telematika Vol 15, No 2: August (2022)
Publisher : Universitas Amikom Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35671/telematika.v15i2.1141

Abstract

The modified SEIR model of the COVID-19 spread is divided into five compartments: susceptible, exposed, infected, and recovered. Based on the results, two equilibrium points were obtained: the disease-free equilibrium point and the endemic equilibrium point. The existence of an equilibrium point depends on the value of the basic reproduction number R0, as well as on stability. The endemic equilibrium point exists if it is satisfied R0>1. Then, the disease-free equilibrium point is said to be locally asymptotic stable if R0<1, and the endemic equilibrium point is locally asymptotic stable if R0>1. Sensitivity analysis was performed to determine the most influential parameters in the spread of the virus. Finally, the numerical simulations determine the behavior of the model and support the results of the dynamic analysis.
Co-Authors Adam Maurizio Winata Anggriani, Indira Anggriani, Indira Antik Widi Anugrah Arya Dwi Kustiawan Asmianto Asmianto Basuki Widodo Chandrawati Putri Wulandari Denis Sospeter Mukama Dwi Rantini Fikri Arif Abdillah Heru Dwi Cahyono Indira Anggriani Mohamad Tafrikan Mohamad Tafrikan Mohamad Tafrikan Mohammad tafrikan Muhammad Rafi Nabil Arsalan Nailul Izzati Nayu Nurrohma Hidayah Norasia, Yolanda Prisma Megantoro Ratih Ardiati Ningrum Retna Apsari Rizki Putra Prastio Rois, Muhammad Abdurrahman Tafrikan, Mohamad Tafrikan, Mohamad Tahta Amrillah Wahyuni Ningsih Zulaikha Zulaikha